Electrical service interface system

ABSTRACT

An electrical service interface system include an energy storage device and inverter mounted to a transformer tower, wherein each of the energy storage device and inverter include guide wheels configured to rollably mount the energy storage device and inverter to corresponding guide rails mounted to a support pad, and to align the energy storage device to the inverter, and the inverter to the transformer tower. In an installed configuration, the energy storage device electrically and mechanically couples to the inverter via a DC connector and one or more latching mechanisms, and the inverter mechanically and electrically couples to the transformer tower via an AC connector and one or more latching mechanisms.

TECHNICAL FIELD

The disclosed technology relates generally to electrical interfacesystems. More specifically, the present disclosure is directed towards amechanically integrated inverter and energy storage device.

BACKGROUND

The incorporation of DC-to-AC inverters in power grids has become moreprevalent with the increasing popularity of renewable energy sources,such as solar energy, to supplement power from the power grid. Moreover,energy storage devices have also been incorporated onto the power grid,generally near both the load and the inverter. For example, someresidential or business consumers of electricity have added solar panelsand an inverter to supplement or displace their use of power from thepower grid, and have further added energy storage devices, such asbatteries, to store excess energy for use when solar power is notavailable (i.e., at night).

Implementing systems with both inverters and energy storage devices,however, has created challenges for power companies and consumers. Forexample, these systems are often electrically incompatible with olderelectric systems or require extensive and costly installationmodifications. As a result, the integration of new electric systems ontoexisting electric grids often results in voltage problems andintermittent power production and distribution.

Furthermore, in some cases, the integration of new electric systems intothe existing power grid require the addition of new structures tosupport the new system. For example, a separate pad mount may berequired for each of the inverter and energy storage device. Thisresults in costly installation fees and complex system connections thatmay result in the disruption of power to nearby residences and businessif easement or connections are improper or faulty.

BRIEF SUMMARY OF EMBODIMENTS

Embodiments of the disclosed technology are directed towards a padmounted electrical service interface system. In particular, someembodiments of the disclosed technology are directed towards integratingan inverter and energy storage device onto an existing electricalsystem. As disclosed herein, an example electrical service interfacesystem may include a plurality of rails mounted on a top surface of asupport pad and abutted against a transformer tower mounted on the samesupport pad.

In some embodiments, the electrical service interface system includes anenergy storage device, an inverter, and a set of alignment devices. Inother embodiments, the set of alignment devices includes guide wheelsrotatably mounted to and extending outward from a bottom side of theinverter, where the guide wheels are disposed within a longitudinalgroove of the guide rails. In other embodiments, the set of alignmentdevices includes guide wheels rotatably mounted to and extending outwardfrom a bottom side of the energy storage device, where the guide wheelsare disposed within a longitudinal groove of the guide rails. In otherembodiments, the guide wheels are configured to roll longitudinallyalong the guide rails, such that the inverter and energy storage devicerollably mount to the support pad.

BRIEF DESCRIPTION OF THE DRAWINGS

The technology disclosed herein, in accordance with one or more variousembodiments, is described in detail with reference to the followingfigures. The drawings are provided for purposes of illustration only andmerely depict typical or example embodiments of the disclosedtechnology. These drawings are provided to facilitate the reader'sunderstanding of the disclosed technology and shall not be consideredlimiting of the breadth, scope, or applicability thereof. It should benoted that for clarity and ease of illustration these drawings are notnecessarily made to scale.

FIG. 1 illustrates a perspective view of an electrical service interfacesystem with an energy storage device and inverter assembly, consistentwith embodiments disclosed herein.

FIG. 2 illustrates components of an electrical service interface systemwith an energy storage device and inverter, consistent with embodimentsdisclosed herein.

FIG. 3 illustrates a cross-section side view of an electrical serviceinterface system with an energy storage device and an inverter assemblyattached to the transformer tower, consistent with embodiments disclosedherein.

FIG. 4 illustrates a front view of an energy storage device, consistentwith embodiments disclosed herein.

FIG. 5 illustrates a side view of an energy storage device, consistentwith embodiments disclosed herein

FIG. 6 illustrates a front view of an inverter, consistent withembodiments disclosed herein.

FIG. 7 illustrates a cross-section side view of an inverter, consistentwith embodiments disclosed herein.

The figures are not intended to be exhaustive or to limit the disclosedtechnology to the precise form disclosed. It should be understood thatthe disclosed technology can be practiced with modification andalteration, and that the disclosed technology be limited only by theclaims and the equivalents thereof.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The following description is non-limiting and is made merely for thepurpose of describing the general principles of the disclosedembodiments. Numerous specific details are set forth to provide a fullunderstanding of various aspects of the subject disclosure. It will beapparent, however, to one ordinarily skilled in the art that variousaspects of the subject disclosure may be practiced without some of thesespecific details. In other instances, well-known structures andtechniques have not been shown in detail to avoid unnecessarilyobscuring the subject disclosure.

Some embodiments of the disclosure provide an electrical serviceinterface system. As disclosed herein, an electrical interface systemmay include an assembly to integrate an inverter and a fixed durationenergy storage device fitted onto an electrical service interface systemso that the completed assembly may consist of one box when a lid coversthe fitted assembly. In some embodiments, the electrical serviceinterface system may be integrated onto a support pad and a transformertower. By way of example, the transformer tower may include an alreadyexisting and installed pad-mount transformer. A pad-mount transformer isa ground mounted electric power distribution transformer that mayprovide the final voltage transformation in the electric powerdistribution. The transformer may also be mounted on a shelf (i.e.,directly mounted on the service panel), or other support structure, asknown in the art. The final voltage transformation may result instepping down the voltage in the selected distribution lines to theappropriate level for consumer use.

In some embodiments, the system may further include a set of guide railsmounted on the support pad to help guide and mount the inverter andenergy storage device to the transformer tower.

In some embodiments, the inverter and energy storage device may includealignment devices mounted to and extending outward from a bottom side ofthe inverter and energy storage device respectively. By way of exampleonly, the alignment devices may be utilized to help align and positionthe inverter onto the support pad and properly attach the inverter ontothe transformer tower. By way of another example, the alignment devicesmay be utilized to align and position the energy storage device onto thesupport pad and attach the energy storage device to the inverter. Thealignment device may include, without limitation, wheels, roller chains,internal ring gear, and linear slides.

In some embodiments, the inverter may be securely attached to andabutted against the transformer tower using a latching mechanism. Theinverter may also be securely attached and abutted against an energystorage device using a latching mechanism. In other embodiments, theinverter may be securely attached to the transformer tower on one sideof the inverter and securely attached to the energy storage device onthe other side of the inverter. Referring to FIG. 1, examples oflatching mechanisms 120 and 125 may include, without limitation, adeadbolt latch, a spring latch, a boxlatch, a latchbolt, a paddle latch,a rotary latch, a deadlocking latchbolt, a drawbolt, a drawbolt withpadlock loop, a padlock look, a slam latch, a cam latch, a Norfolklatch, a Suffolk latch, a crossbar, a compression latch, a draw latch, arotary latch, a barrel bolt lock, a turn lock, a screws, bolt, or abarrel nut.

By way of example only, the integrated inverter and energy storagedevice assembly may also function, or incorporate components thatfunction as a dynamic and reactive power source when electricalconnections are established. Furthermore, when integrated inverter andenergy storage assemblies are deployed as a fleet or network, power andelectricity may be provided to residences and businesses, as well ascollected and stored from other residence or business on the power grid.In some examples, the disclosed technology may provide power andelectricity during power outages, thus providing flexible voltage andelectrical power solutions. As such, the disclosed technology provides aflexible solution for voltage regulation issues for electrical serviceinterface systems.

FIG. 1 illustrates a perspective view of an electrical service interfacesystem. As illustrated, electrical service interface system 100 includesenergy storage device 115 and inverter 110. Electrical service interfacesystem 100 may be mounted on a support pad 140, and a transformer tower105 may also be mounted on the support pad. Transformer tower 105 may beused to service or couple to underground distribution networks to serveurban and rural residences or commercial and industrial energy loads.

As further illustrated, the electrical service interface system 100includes a plurality of guide rails 135 mounted on a top surface ofsupport pad 140. The plurality of guide rails 135 enables alignment ofinverter 100 and energy storage device 115 to each other, as well as totransformer tower 105.

Inverter 110 may include a set of alignment devices disposed on a bottomside of the inverter 110. In some embodiments, the alignment device mayinclude guide wheels 130 rotatably mounted to and extending outward fromthe bottom side of the inverter 110. In other embodiments, the guidewheels 130 may be disposed within a longitudinal groove of the guiderails 135 on the support pad 140. In other embodiments, the alignmentdevice may include roller chains, internal ring gear, linear slides, orother alignment devices as known in the art.

Energy storage device 115 may also be configured with a set of alignmentdevices disposed on a bottom side of the energy storage device 110.Similar to the alignment devices described above with respect to theinverter, the alignment device 115 may include guide wheels 130rotatably mounted to and extending outward from the bottom side of theenergy storage device 115. In other embodiments, the alignment devicemay include roller chains, internal ring gear, linear slides, or otheralignment devices as known in the art.

As further illustrated in FIG. 1, latch mechanisms 120 and 125 may beused to securely place the inverter 110 and energy storage device 115onto the support 140 and attached to the transformer tower 105. In someembodiments, the inverter 110 may be coupled to the transformer tower105 by a latch mechanism 120. In other embodiments, the inverter 110 maybe coupled to an energy storage device 115 by a latch mechanism 125. Byway of example only, the inverter 110 may be coupled to the transformertower 105 on one side of the inverter 110 and may be coupled to anenergy storage device 115 on the other side of the inverter 110. A lidmay attach onto the transformer tower 105 so that the fitted assemblywith a lid cover results in a single box housing.

FIG. 2 illustrates components of an electrical service interface system,including energy storage device 250 and inverter 225. As illustrated,the system may be mounted on a support pad 265 and may be orthogonallyoriented with respect to and abutted against a transformer tower 205. Insome embodiments, a guide rail 220 is installed on support pad 265 toassist in positioning and aligning inverter 225 and energy storagedevice 250 on support pad 265. In an installed configuration, energystorage device 250 abuts against inverter 225, and inverter 225 abutsagainst transformer tower 205. As illustrated, each of energy storagedevice 250 and inverter 225 include enclosures. For example, eachenclosure may be a rectangular prism shape, with a front side, a backside, a top side, a bottom side, and two opposing edge sides. Asdescribed herein, whenever reference is made to mounting or attachinglatches, guide wheels, or alignment pins to either the energy storagedevice or inverter, one of ordinary skill in the art would understandthat such mounting or attaching is made with respect to one of the sidesof the corresponding enclosure.

As further illustrated in FIG. 2, the inverter 225 includes a pluralityof guide wheels 245, attached to a bottom side of inverter 225 (i.e.,the bottom side of the inverter enclosure), enabling inverter 225 to berollably mounted onto support pad 265 so that the inverter 225 may abutagainst the transformer tower 205. In other embodiments, the inverter225 is abutted against the transformer tower 205 to establish anelectrical connection with the transformer tower 205. In someembodiments, the back side of the inverter 225 includes an AC connectorconfigured to electrically couple to the AC connector 270 on thetransformer tower 205. For example, the AC connector on the back side ofthe inverter 225 may be a male AC connector bus configured to create anelectrical connection to the corresponding female AC connector 270attached to the side of the transformer tower 205.

In some embodiments, energy storage device 250 includes a plurality ofguide wheels 260 that enable the energy storage device 250 to rollablymount to support pad 265 enabling energy storage device 250 to abutagainst inverter 225. In other embodiments, the energy storage device250 may be abutted against the inverter 225 to establish an electricalconnection between the inverter 225 and transformer tower 205. In someembodiments, a back side of the energy storage device 260 includes a DCconnector configured to electrically couple to the DC connector 230 onthe inverter 225. For example, the DC connector on the back side of theenergy storage device 250 may be a male DC connector configured tocreate an electrical connection to the corresponding female DC connector240 attached to the inverter 225.

Alignment pins may also be utilized to align the inverter to both theenergy storage device and the transformer tower. In one embodiment, analignment pin is located on a back side of the inverter 225, thealignment pin being configured to insert into an alignment receptacle215 located on the transformer tower 205. By inserting the alignment pinof the inverter 225 into the alignment receptacle 215, the inverter isproperly positioned relative to the transformer tower 205.

In some embodiments, an alignment pin is also located on a back side ofthe energy storage device 250, the alignment pin being configured toinsert into an alignment receptacle 240 located on the front side of theinverter 225. By inserting the alignment pin of the energy storagedevice 250 into the alignment receptacle 240 of the inverter, the energystorage device 250 is properly positioned relative to the inverter 225.

Energy storage device 250 may also be securely attached to the inverter225 via a latch 255 that couples to a notch 235 on the inverter 225.Inverter 225 may also include a latch mechanism 275 that couples to anotch 280 on the transformer tower 205 to ensure that the inverter 225is securely attached to transformer tower 205. In some embodiments,pairs of latching mechanisms may be used (i.e., a latching mechanism maybe mounted on either side of both the inverter and energy storagedevice). Accordingly, the inverter 225 may be secured to the energystorage device 250 and the transformer tower 205 using the latchingmechanisms.

FIG. 3 illustrates a cross-section side view of an electrical serviceinterface system. As illustrated, electrical service interface system300 includes inverter 310 and energy storage device 315. The system maybe mounted and electrically coupled to transformer tower 305. In someembodiments, the inverter 310 and energy storage device 315 may beconfigured with a set of alignment devices disposed on the respectivebottom surface of both inverter 310 and energy storage device 315.

As illustrated, the system includes an inverter 310 configured tomechanically couple to a transformer tower 305. Inverter 310 may beconfigured to electrically couple with the transformer tower 305.Inverter 310 may include an AC connector 360 located on the back side ofthe inverter 310, the AC connector being configured to electricallycouple to an AC connector 365 located on the front side of thetransformer tower 305. In order to align inverter 310 with transformertower 305, inverter 310 may include an alignment pin 355 that isconfigured to insert into an alignment receptacle 370 when the inverter310 abuts to the transformer tower 305. In order to secure inverter 310to transformer tower 305, inverter 310 may include a latch mechanism 320configured to mechanically couple to a receiving notch on transformertower 305.

In some embodiments, inverter 310 may be further configured toelectrically couple to energy storage device 315. Energy storage device315 may include a battery, a capacitor, or other means of storingelectrical energy as known in the art. Inverter 310 may include a DCconnector 335 located on the front side of inverter 310, the DCconnector 335 being configured to couple to a DC connector 330 locatedon the back side of energy storage device 315. In order to align energystorage device 315 to inverter 310, inverter 310 may include analignment pin receptacle 335 configured to receive an alignment pin 330when energy storage device 315 abuts to inverter 310. In order to secureinverter 310 to energy storage device 315, energy storage device 315 mayinclude a latch mechanism 325 configured to mechanically couple to areceiving notch on inverter 310.

FIG. 4 illustrates a front view component of an energy storage device.For example, energy storage device 405 may be a battery, a capacitor, aflywheel, a compressed air-energy storage, a thermal, solar, or pumpedhydro power energy storage device, or other energy storage device asknown in the art.

As illustrated, the energy storage device may include guide wheels 410rotatably mounted to energy storage device 405, and configured to enableenergy storage device 405 to rollably mount to an inverter and atransformer tower via guide rails on a pad mount. Furthermore, energystorage device 405 may include a latch mechanism 415 on one or bothsides of the energy storage device enclosure, as described above. Insome embodiments, the electrical storage device 405 may utilize thelatch 415 that couples to a notch on the inverter to secure the energystorage device to the inverter.

FIG. 5 illustrates a side view of an energy storage device. Asillustrated, energy storage device 505 may include guide wheels 525.Latch 510 attached to the energy storage device 505 may securely coupleto a notch on a selected apparatus (i.e., the inverter). In otherembodiments, the energy storage device 505 may attach itself onto anyother apparatus contained within the pad counted electrical system. Theenergy storage device 505 may also include an alignment pin 515configured to insert into an accommodating alignment receptacle.

Alternatively, energy storage device 505 may couple directly orindirectly to the transformer tower. The energy storage device 505 mayinclude an inverter within the housing further eliminating the need forthe energy storage device 505 to be coupled to another apparatuscontaining an inverter. As such, the energy storage device 505 with aself-contained inverter may result in a dynamic and reactive powersource when the energy storage device is coupled to the transformertower. In such an embodiment, the energy storage device 505 may includea AC connector to electrically couple to an AC connector on a servicetransformer (i.e., the transformer tower).

As further illustrated in FIG. 5, energy storage device 505 may includea DC connector 520 that couples to an accommodating DC connector in aselected apparatus (i.e., the inverter). In some embodiments, DCconnector 520 may be male and may be configured to insert into a femaleDC connector (e.g., using an interference fit, a friction fit, asnap-fit, a form-fit, or another coupling mechanism as known in theart).

FIG. 6 illustrates a perspective view of an inverter. As illustrated,inverter 605 may include guide wheels 620 so that the inverter 605 maybe rollably mounted onto a top surface of a support pad. Inverter 605may also include one or more latches 625 to securely couple to aselected apparatus (i.e., the energy storage device or transformertower, or both). When inverter 605 is installed and attached to thetransformer tower, as illustrated by FIG. 1, the inverter 605 andtransformer tower may act as a reactive power source.

Inverter 605 may include one or more notches 630 enabling anotherapparatus (i.e., the energy storage device) to securely couple (vialatches) to the inverter 605. In some embodiments, the inverter 605 mayinclude one or more alignment receptacles 610 configured to receivealignment pins mounted on the energy storage device, to properly alignthe energy storage device to the inverter 605.

FIG. 7 illustrates a side cross-section view of an inverter. Theinverter 700 may include guide wheels 725 rotatably mounted to a bottomsurface of the inverter, such that inverter 700 may be rollably mountedand guided by guide rails (i.e., guide rails mounted on a support pad,as illustrated in FIGS. 1 and 2).

As illustrated in FIG. 7, inverter 700 may include DC connector 720.Inverter 700 may also be configured to include AC connector 735 (e.g.,located on the back side of inverter 700). AC connector 735 may beconfigured to electrically couple to an AC connector on a servicetransformer (i.e., the transformer tower). To further aid the inverterin establishing a proper electrical connection with the AC connector,the inverter may be configured to include an alignment pin 730 locatedat the back side of the inverter 700. The inverter may further includean alignment pin receptacle 715 so that another device may be securelyaligned next to the inverter 700.

As further illustrated in FIG. 7, inverter 700 may have a latchingmechanism 705, 710 to ensure that the inverter 700 in properly andsecurely mounted on a service transformer.

While various embodiments of the disclosed technology have beendescribed above, it should be understood that they have been presentedby way of example only, and not of limitation. Likewise, the variousdiagrams may depict an example architectural or other configuration forthe disclosed technology, which is done to aid in understanding thefeatures and functionality that can be included in the disclosedtechnology. The disclosed technology is not restricted to theillustrated example architectures or configurations, but the desiredfeatures can be implemented using a variety of alternative architecturesand configurations. Indeed, it will be apparent to one of skill in theart how alternative functional, logical or physical partitioning andconfigurations can be implemented to implement the desired features ofthe technology disclosed herein. Also, a multitude of differentconstituent module names other than those depicted herein can be appliedto the various partitions. Additionally, with regard to flow diagrams,operational descriptions and method claims, the order in which the stepsare presented herein shall not mandate that various embodiments beimplemented to perform the recited functionality in the same orderunless the context dictates otherwise.

Although the disclosed technology is described above in terms of variousexemplary embodiments and implementations, it should be understood thatthe various features, aspects and functionality described in one or moreof the individual embodiments are not limited in their applicability tothe particular embodiment with which they are described, but instead canbe applied, alone or in various combinations, to one or more of theother embodiments of the disclosed technology, whether or not suchembodiments are described and whether or not such features are presentedas being a part of a described embodiment. Thus, the breadth and scopeof the technology disclosed herein should not be limited by any of theabove-described exemplary embodiments.

Terms and phrases used in this document, and variations thereof, unlessotherwise expressly stated, should be construed as open ended as opposedto limiting. As examples of the foregoing: the term “including” shouldbe read as meaning “including, without limitation” or the like; the term“example” is used to provide exemplary instances of the item indiscussion, not an exhaustive or limiting list thereof; the terms “a” or“an” should be read as meaning “at least one,” “one or more” or thelike; and adjectives such as “conventional,” “traditional,” “normal,”“standard,” “known” and terms of similar meaning should not be construedas limiting the item described to a given time period or to an itemavailable as of a given time, but instead should be read to encompassconventional, traditional, normal, or standard technologies that may beavailable or known now or at any time in the future. Likewise, wherethis document refers to technologies that would be apparent or known toone of ordinary skill in the art, such technologies encompass thoseapparent or known to the skilled artisan now or at any time in thefuture.

The presence of broadening words and phrases such as “one or more,” “atleast,” “but not limited to” or other like phrases in some instancesshall not be read to mean that the narrower case is intended or requiredin instances where such broadening phrases may be absent. The use of theterm “module” does not imply that the components or functionalitydescribed or claimed as part of the module are all configured in acommon package. Indeed, any or all of the various components of amodule, whether control logic or other components, can be combined in asingle package or separately maintained and can further be distributedin multiple groupings or packages or across multiple locations.

Additionally, the various embodiments set forth herein are described interms of exemplary block diagrams, flow charts and other illustrations.As will become apparent to one of ordinary skill in the art afterreading this document, the illustrated embodiments and their variousalternatives can be implemented without confinement to the illustratedexamples. For example, block diagrams and their accompanying descriptionshould not be construed as mandating a particular architecture orconfiguration.

What is claimed is:
 1. An electrical service interface systemcomprising: a plurality of guide rails mounted on a top surface of asupport pad, and perpendicularly oriented with respect to and abuttedagainst a transformer tower, the transformer tower also being mounted onthe support pad; an energy storage device comprising a first enclosure;an inverter comprising a second enclosure; a first set of guide wheelsrotatably mounted to and extending outward from a bottom side of thefirst enclosure, each of the first set of guide wheels being disposedwithin a longitudinal groove in a first of the plurality of guide rails;a second set of guide wheels rotatably mounted to and extending outwardfrom the bottom side of the first enclosure, each of the second set ofguide wheels being disposed within a longitudinal groove in a second ofthe plurality of guide rails; a third set of guide wheels rotatablymounted to and extending outward from a bottom side of the secondenclosure, each of the third set of guide wheels being disposed within alongitudinal groove in the first of the plurality of guide rails; and afourth set of guide wheels rotatably mounted to and extending outwardfrom the bottom side of the second enclosure, each of the fourth set ofguide wheels being disposed within a longitudinal groove in the secondof the plurality of guide rails; wherein each guide wheel is configuredto roll longitudinally along one of the plurality of guide rails, suchthat the first enclosure and second enclosure rollably mount to thesupport pad.
 2. The system of claim 1, wherein the energy storage devicefurther comprises a battery disposed within the first enclosure.
 3. Thesystem of claim 1, wherein the first enclosure further comprises a firstlatch configured to mechanically couple to the second enclosure.
 4. Thesystem of claim 3, wherein the second enclosure further comprises asecond latch configured to mechanically couple to the transformer tower.5. The system of claim 4, wherein the first latch is located on a firstside of the first enclosure and couples to a notch located on the firstside of the second enclosure.
 6. The system of claim 4, wherein thefirst enclosure further comprise a first alignment pin located on a backside of the first enclosure, and configured to insert into a firstalignment receptacle located on a front side of the second enclosurewhen the first enclosure abuts to the second enclosure.
 7. The system ofclaim 6, wherein the second enclosure further comprise a secondalignment pin located on a back side of the second enclosure, andconfigured to insert into a second alignment receptacle located on afront side of the transformer tower when the second enclosure abuts tothe transformer tower.
 8. The system of claim 1, wherein the energystorage device further comprises a first DC connector accessible througha first aperture located in a back side of the first enclosure and theinverter further comprises a second DC connector accessible through asecond aperture located in a front side of the second enclosure, thefirst DC connector being configured to electrically couple to the secondDC connector when the first enclosure abuts the second enclosure.
 9. Thesystem of claim 8, wherein the inverter further comprises a first ACconnector accessible through a third aperture located in a back side ofthe second enclosure and the inverter further comprises a second ACconnector accessible through a fourth aperture in a front side of thetransformer tower, the first AC connector being configured toelectrically couple to the second AC connector when the second enclosureabuts the transformer tower.
 10. An energy storage device comprising: afirst enclosure; a set of alignment devices disposed on a bottom side ofthe first enclosure; and a latch rigidly mounted on a first side of thefirst enclosure, the latch being configured to mechanically couple to anotch located on a first side of a second enclosure; wherein the set ofalignment devices comprises a first set of guide wheels rotatablymounted to and extending outward from a bottom side of the firstenclosure, each of the first set of guide wheels being disposed within alongitudinal groove in a first of the plurality of the guide rails, anda second set of guide wheels rotatably mounted to and extending outwardfrom a bottom side of the second enclosure, each of the third set ofguide wheels being disposed within a longitudinal groove in the first ofthe plurality of guide rails.
 11. The energy storage device of claim 10,wherein the first enclosure further comprises an alignment pin locatedon a back side of the first enclosure, and configured to insert into analignment receptacle located on a front side of a second enclosure whenthe first enclosure abuts to the second enclosure.
 12. The energystorage device of claim 10, wherein the first enclosure comprises afirst DC connector accessible through a first aperture located in a backside of the first enclosure.
 13. The energy storage device of claim 12,wherein the first DC connector is configured to electrically couple tothe second DC connector located on a front side of a second enclosure.14. An inverter comprising: a first enclosure; a set of alignmentdevices disposed on a bottom side of the first enclosure; and and alatch configured to mechanically couple to a notch located on atransformer tower; wherein the set of alignment devices comprises afirst set of guide wheels rotatably mounted to and extending outwardfrom a bottom side of the first enclosure, each of the first set ofguide wheels being disposed within a longitudinal groove in a first ofthe plurality of guide rails, and a second set of guide wheels rotatablymounted to and extending outward from a bottom side of a secondenclosure, each of the third set of guide wheels being disposed within alongitudinal groove in the first of the plurality of guide rails. 15.The inverter of claim 14, wherein the first enclosure further comprisesa first DC connector located on a front side of the first enclosure, thefirst DC connector being configured to electrically couple to a secondDC connector located on a back side of a second enclosure.
 16. Theinverter of claim 14, wherein the first enclosure further comprises afirst AC connector accessible on a back side of the first enclosure, thefirst AC connector being configured to electrically couple to a secondAC connector located on the transformer tower.
 17. The inverter of claim14, wherein the first enclosure further comprises a first alignment pinlocated on a back side of the first enclosure, the first alignment pinbeing configured to insert into a first alignment receptacle located onthe transformer tower when the first enclosure abuts to the transformertower.
 18. The inverter of claim 17, wherein the first enclosure furthercomprises a second alignment receptacle located on a front side of thefirst enclosure, the second alignment receptacle being configured toreceive a second alignment pin located on a back side of a secondenclosure when the second enclosure abuts to the first enclosure.